\documentclass{article}

\usepackage{graphicx}
\usepackage{float}

\newfloat{figtab}{htb}{fgtb}
\makeatletter
  \newcommand\figcaption{\def\@captype{figure}\caption}
  \newcommand\tabcaption{\def\@captype{table}\caption}
\makeatother

\begin{document}
\begin{figtab}
  \begin{minipage}[b]{0.45\linewidth}
    \centering
    \includegraphics[width = \linewidth]{example-image}
    \figcaption{Example Image}
  \end{minipage}\quad
  \begin{minipage}[b]{0.45\linewidth}
    \centering
    \tabcaption{Example Tabular}
    \begin{tabular}{cc}
      Hello & world
    \end{tabular}
  \end{minipage}
\end{figtab}
\end{document}